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Current content: 159 515 718 patent documents

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154 531 new documents added

1 078 520 documents amended

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EP 0286874 B1 19910925 - DEVELOPER COMPOSITIONS FOR SILVER HALIDE PHOTOGRAPHIC MATERIALS

Title (en)

DEVELOPER COMPOSITIONS FOR SILVER HALIDE PHOTOGRAPHIC MATERIALS

Publication

EP 0286874 B1 19910925 (EN)

Application

EP 88104616 A 19880323

Priority

IT 2008787 A 19870413

Abstract (en)

[origin: EP0286874A1] The addition to an aqueous alkaline developer composition for silver halide photographic materials of a dialkylaminomethane diphosphonic acid compound sequestering agent increases the resistance of the developer composition against aerial oxidation and inhibits calcareous deposit formation.

IPC 1-7

G03C 5/30; G03C 7/30

IPC 8 full level

G03C 7/30 (2006.01); G03C 5/305 (2006.01)

CPC (source: EP US)

G03C 5/3053 (2013.01 - EP US)

Designated contracting state (EPC)

DE FR GB

DOCDB simple family (publication)

EP 0286874 A1 19881019; EP 0286874 B1 19910925; DE 3865063 D1 19911031; IT 1215423 B 19900208; IT 8720087 A0 19870413; JP S63266450 A 19881102; US 4873180 A 19891010

DOCDB simple family (application)

EP 88104616 A 19880323; DE 3865063 T 19880323; IT 2008787 A 19870413; JP 9015188 A 19880412; US 17825188 A 19880406